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Diffstat (limited to 'test/test_tapdmx.c')
| -rw-r--r-- | test/test_tapdmx.c | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/test/test_tapdmx.c b/test/test_tapdmx.c new file mode 100644 index 0000000..09bd0dc --- /dev/null +++ b/test/test_tapdmx.c @@ -0,0 +1,160 @@ +/* test_tapdmx.c - Test recording a TS from the dmx device. + * very similar to test_dvr but using the new DMX_OUT_TSDEMUX_TAP + * usage: test_tapdmx PID [more PIDs...] + * + * test_dvr is + * Copyright (C) 2003 convergence GmbH + * Johannes Stezenbach <js@convergence.de> + * test_tapdmx conversion is + * Copyright (C) 2011 B1 Systems GmbH + * Stefan Seyfried <seife+dvb@b1-systems.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public License + * as published by the Free Software Foundation; either version 2.1 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +//hm, I haven't tested writing large files yet... maybe it works +#define _LARGEFILE64_SOURCE + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <sys/ioctl.h> +#include <errno.h> +#include <inttypes.h> + +#include <linux/dvb/dmx.h> + +static unsigned long BUF_SIZE = 64 * 1024; +static unsigned long long total_bytes; + +static void usage(void) +{ + fprintf(stderr, "usage: test_tapdmx file PID [more PIDs...]\n" + " record a partial TS stream consisting of TS packets\n" + " with the selected PIDs to the given file.\n" + " Use PID 0x2000 to record the full TS stream (if\n" + " the hardware supports it).\n" + " The demux device used can be changed by setting\n" + " the environment variable DEMUX.\n" + " You can override the input buffer size by setting BUF_SIZE to\n" + " the number of bytes wanted.\n" + " Note: There is no output buffering, so writing to stdout is\n" + " not really supported, but you can try something like:\n" + " BUF_SIZE=188 ./test_tapdmx /dev/stdout 0 2>/dev/null | xxd\n" + " ./test_tapdmx /dev/stdout 0x100 0x110 2>/dev/null| xine stdin://mpeg2\n" + "\n"); + exit(1); +} + + +static void process_data(int dvrfd, int tsfd) +{ + uint8_t buf[BUF_SIZE]; + int bytes, b2; + + bytes = read(dvrfd, buf, sizeof(buf)); + if (bytes < 0) { + perror("read"); + if (errno == EOVERFLOW) + return; + fprintf(stderr, "exiting due to read() error\n"); + exit(1); + } + total_bytes += bytes; + b2 = write(tsfd, buf, bytes); + if (b2 == -1) { + perror("write"); + exit(1); + } else if (b2 < bytes) + fprintf(stderr, "warning: read %d, but wrote only %d bytes\n", bytes, b2); + else + fprintf(stderr, "got %d bytes (%llu total)\n", bytes, total_bytes); +} + +int main(int argc, char *argv[]) +{ + int dmxfd, tsfd; + unsigned int pid; + struct dmx_pes_filter_params f; + char *dmxdev = "/dev/dvb/adapter0/demux0"; + int i; + char *chkp; + + if (argc < 3) + usage(); + + if (getenv("DEMUX")) + dmxdev = getenv("DEMUX"); + + fprintf(stderr, "using '%s'\n" + "writing to '%s'\n", dmxdev, argv[1]); + tsfd = open(argv[1], O_WRONLY | O_CREAT | O_TRUNC | O_LARGEFILE, 0664); + if (tsfd == -1) { + perror("cannot write output file"); + return 1; + } + + dmxfd = open(dmxdev, O_RDONLY); + if (dmxfd == -1) { + perror("cannot open dmx device"); + return 1; + } + + if (getenv("BUF_SIZE") && ((BUF_SIZE = strtoul(getenv("BUF_SIZE"), NULL, 0)) > 0)) + fprintf(stderr, "BUF_SIZE = %lu\n", BUF_SIZE); + + pid = strtoul(argv[2], &chkp, 0); + if (pid > 0x2000 || chkp == argv[2]) + usage(); + fprintf(stderr, "adding filter for PID 0x%04x\n", pid); + + memset(&f, 0, sizeof(f)); + f.pid = (uint16_t) pid; + f.input = DMX_IN_FRONTEND; + f.output = DMX_OUT_TSDEMUX_TAP; + f.pes_type = DMX_PES_OTHER; + + if (ioctl(dmxfd, DMX_SET_PES_FILTER, &f) == -1) { + perror("DMX_SET_PES_FILTER"); + return 1; + } + + for (i = 3; i < argc; i++) { + pid = strtoul(argv[i], &chkp, 0); + if (pid > 0x2000 || chkp == argv[i]) + usage(); + fprintf(stderr, "adding filter for PID 0x%04x\n", pid); + if (ioctl(dmxfd, DMX_ADD_PID, &pid) == -1) { + perror("DMX_ADD_PID"); + return 1; + } + } + if (ioctl(dmxfd, DMX_START) == -1) { + perror("DMX_START"); + close(dmxfd); + return 1; + } + + for (;;) { + process_data(dmxfd, tsfd); + } + + close(dmxfd); + return 0; +} |